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LM4890

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1W 音频功率放大器

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数据表

LM4890

正在供货
数据表 立即订购

产品详情

Audio input type Analog Input Architecture Class-AB Speaker channels (max) Mono Control interface Hardware Output power (W) 1.2 Power stage supply (max) (V) 5.5 Power stage supply (min) (V) 2.2 THD + N at 1 kHz (%) 0.1 Load (min) (Ω) 8 Analog supply voltage (min) (V) 2.2 Analog supply voltage (max) (V) 5.5 Rating Catalog Operating temperature range (°C) -40 to 85
Audio input type Analog Input Architecture Class-AB Speaker channels (max) Mono Control interface Hardware Output power (W) 1.2 Power stage supply (max) (V) 5.5 Power stage supply (min) (V) 2.2 THD + N at 1 kHz (%) 0.1 Load (min) (Ω) 8 Analog supply voltage (min) (V) 2.2 Analog supply voltage (max) (V) 5.5 Rating Catalog Operating temperature range (°C) -40 to 85
VSSOP (DGK) 8 14.7 mm² (3 mm × 4.9 mm) SOIC (D) 8 29.4 mm² (4.9 mm × 6 mm)
  • Available in Space-Saving Packages: DSBGA, VSSOP, SOIC, and WSON
  • Ultra Low Current Shutdown Mode
  • BTL Output Can Drive Capacitive Loads
  • Improved Pop & Click Circuitry Eliminates Noises During Turn-On and Turn-Off Transitions
  • 2.2 - 5.5V Operation
  • No Output Coupling Capacitors, Snubber Networks or Bootstrap Capacitors Required
  • Thermal Shutdown Protection
  • Unity-Gain Stable
  • External Gain Configuration Capability

Key Specifications

  • PSRR at 217Hz, VDD = 5V (Fig. 1): 62dB(typ.)
  • Power Output at 5.0V & 1% THD: 1W(typ.)
  • Power Output at 3.3V & 1% THD: 400mW(typ.)
  • Shutdown Current: 0.1μA(typ.)

All trademarks are the property of their respective owners.

  • Available in Space-Saving Packages: DSBGA, VSSOP, SOIC, and WSON
  • Ultra Low Current Shutdown Mode
  • BTL Output Can Drive Capacitive Loads
  • Improved Pop & Click Circuitry Eliminates Noises During Turn-On and Turn-Off Transitions
  • 2.2 - 5.5V Operation
  • No Output Coupling Capacitors, Snubber Networks or Bootstrap Capacitors Required
  • Thermal Shutdown Protection
  • Unity-Gain Stable
  • External Gain Configuration Capability

Key Specifications

  • PSRR at 217Hz, VDD = 5V (Fig. 1): 62dB(typ.)
  • Power Output at 5.0V & 1% THD: 1W(typ.)
  • Power Output at 3.3V & 1% THD: 400mW(typ.)
  • Shutdown Current: 0.1μA(typ.)

All trademarks are the property of their respective owners.

The LM4890 is an audio power amplifier primarily designed for demanding applications in mobile phones and other portable communication device applications. It is capable of delivering 1 watt of continuous average power to an 8Ω BTL load with less than 1% distortion (THD+N) from a 5VDC power supply.

Boomer audio power amplifiers were designed specifically to provide high quality output power with a minimal amount of external components. The LM4890 does not require output coupling capacitors or bootstrap capacitors, and therefore is ideally suited for mobile phone and other low voltage applications where minimal power consumption is a primary requirement.

The LM4890 features a low-power consumption shutdown mode, which is achieved by driving the shutdown pin with logic low. Additionally, the LM4890 features an internal thermal shutdown protection mechanism.

The LM4890 contains advanced pop & click circuitry which eliminates noises which would otherwise occur during turn-on and turn-off transitions.

The LM4890 is unity-gain stable and can be configured by external gain-setting resistors.

The LM4890 is an audio power amplifier primarily designed for demanding applications in mobile phones and other portable communication device applications. It is capable of delivering 1 watt of continuous average power to an 8Ω BTL load with less than 1% distortion (THD+N) from a 5VDC power supply.

Boomer audio power amplifiers were designed specifically to provide high quality output power with a minimal amount of external components. The LM4890 does not require output coupling capacitors or bootstrap capacitors, and therefore is ideally suited for mobile phone and other low voltage applications where minimal power consumption is a primary requirement.

The LM4890 features a low-power consumption shutdown mode, which is achieved by driving the shutdown pin with logic low. Additionally, the LM4890 features an internal thermal shutdown protection mechanism.

The LM4890 contains advanced pop & click circuitry which eliminates noises which would otherwise occur during turn-on and turn-off transitions.

The LM4890 is unity-gain stable and can be configured by external gain-setting resistors.

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* 数据表 LM4890  1 Watt Audio Power Amplifier 数据表 (Rev. L) 2013-5-3

设计与开发

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仿真模型

LM4890 PSpice Model

SNAM179.ZIP (22 KB) - PSpice 模型
支持的产品和硬件
封装 引脚 CAD 符号、封装和 3D 模型
VSSOP (DGK) 8 Ultra Librarian
SOIC (D) 8 Ultra Librarian
适用于评估类项目的 TI 标准条款与条件。

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